Sounds like the card died. If you have access to another computer you can double check that. Other things you can try is reseating the card and reset BIOS to defaults.
Ok, so I managed to fix the no signal to monitor problem by removing and replacing the CMOS battery on the motherboard.
However, the issue still resides. I've noticed that the artifacts occur in other games like Starcraft 2 as well. The GPU temperatures during these sessions seems to be around 70~79ºC. Is that enough to overheat the GPU?
My friends have suggested baking the card to redo the soldering. Does anyone have any experience with that?
Thanks in advance~
Under 80°C is normal load temp (max from 99- 104°C). Many people have baked and usually it will work for a little while. Plenty of guides if you google.